%I #5 Aug 11 2014 22:45:52
%S 16,179,2080,23940,256067,2474769,21404483,166020522,1163861138,
%T 7445531291,43876608955,240208954149,1230708580912,5938337220753,
%U 27130252386880,117902658339547,489326493663683,1946146450518376
%N Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having nonzero determinant, with rows and columns of the latter in lexicographically nondecreasing order
%C Column 5 of A227558
%H R. H. Hardin, <a href="/A227557/b227557.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A227557/a227557.txt">Empirical polynomial of degree 47</a>
%F Empirical polynomial of degree 47 (see link above)
%e Some solutions for n=4
%e ..0..0..0..0..1....0..1..0..0..1....0..0..1..0..1....0..0..0..1..1
%e ..0..0..0..0..0....0..0..0..0..1....0..1..0..0..1....0..1..0..0..0
%e ..1..1..0..0..0....0..1..1..1..1....1..0..0..0..1....1..1..0..0..0
%e ..1..1..1..0..0....1..0..1..1..0....0..0..0..0..1....0..1..0..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 16 2013